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Radeon KMS Gets Faster X-Video Support

02-15-2010, 08:00 PM

Phoronix: Radeon KMS Gets Faster X-Video Support

If using the latest ATI open-source driver Git code for kernel mode-setting, there may be slightly better X-Video support without any visual slowdowns/problems. Pauli Nieminen has changed around the code so that a video buffer is allocated in the GTT (Graphics Translation Table) to provide faster memory operations that haven't been accelerated by KMS. The patch that provides the performance boost to X-Video under ATI kernel mode-setting can be found on the xorg-driver-ati mailing list and has since been committed...

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Xv was already working very good here. One of the areas where the oss driver really shines compared to fglrx. But of course any improvement is still welcome

And I agree that EXA under KMS could use some speed improvement. I'm now in the situation where I have 2 screens, one fully accelerated EXA/Xv/3D, and one with only shadowfb 'acceleration'. Many 2D operations are much faster with shadowfb than with EXA acceleration.

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Xv works fine for the most part, except for some videos where it simply won't play or cause the players to crash. That Planet Earth birds clip that everyone likes for example. Interestingly enough, if I use the mplayer build from here it plays fine; smooth playback actually, despite my CPU usage going up the roof (not even even fglrx plays that clip that well without having to resort to XvBA).
And yeah, that FireFox issue has been driving me nuts. Good thing I have been moving to Chrome.